MCQOPTIONS
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MCQOPTIONS
This section includes 595 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 201. |
__________ paper is used in the manufacture of newsprint paper. |
| A. | Groundwood |
| B. | Board |
| C. | Tissue |
| D. | Wrapping |
| Answer» B. Board | |
| 202. |
Main constituents of natural rubber is |
| A. | polystyrene |
| B. | polyisoprene |
| C. | polybutadiene |
| D. | polychloroprene |
| Answer» C. polybutadiene | |
| 203. |
Sulphur removal by heating of pyrite ore in presence of air is called its |
| A. | reduction |
| B. | roasting |
| C. | calcination |
| D. | smelting |
| Answer» C. calcination | |
| 204. |
The yield of tar from high temperature carbonisation of dry coal is about __________ percent. |
| A. | 3 |
| B. | 12 |
| C. | 22 |
| D. | 0.3 |
| Answer» B. 12 | |
| 205. |
Na2CO3.10H2O is called |
| A. | washing soda |
| B. | soda ash |
| C. | slaked lime |
| D. | quicklime |
| Answer» B. soda ash | |
| 206. |
Oxygen is produced by fractionation of air using __________ process. |
| A. | Linde's |
| B. | Claude's |
| C. | either (a) or (b) |
| D. | none of these |
| Answer» D. none of these | |
| 207. |
Bisphenol A is produced by the condensation of acetone with |
| A. | formaldehyde |
| B. | ethyl alcohol |
| C. | diethyl ether |
| D. | phenol |
| Answer» E. | |
| 208. |
Raw materials required for the manufacture of __________ is acetylene and hydrochloric acid. |
| A. | phthalic anhydride |
| B. | vinyl chloride |
| C. | maleic anhydride |
| D. | dacron |
| Answer» C. maleic anhydride | |
| 209. |
Digestion of wood-base materials (for manufacture of pulp) is done to |
| A. | remove lignin. |
| B. | produce long fibres. |
| C. | prevent deterioration on storage. |
| D. | none of these. |
| Answer» B. produce long fibres. | |
| 210. |
Sucrose is a disaccharide consisting of |
| A. | glucose and glucose |
| B. | glucose and fructose |
| C. | glucose and galactose |
| D. | fructose and galactose |
| Answer» C. glucose and galactose | |
| 211. |
Cellulose percentage in bamboo fibre is about |
| A. | 10 |
| B. | 20 |
| C. | 50 |
| D. | 85 |
| Answer» D. 85 | |
| 212. |
__________ is produced using molasses as the starting raw material. |
| A. | Methyl alcohol |
| B. | Ethyl alcohol |
| C. | Benzol |
| D. | Dimethyl ether |
| Answer» C. Benzol | |
| 213. |
Higher vicosity index of a lubricating oil denotes |
| A. | less changes in fluidity of oil with temperature. |
| B. | substantially high change in fluidity of oil with temperature. |
| C. | its unsuitability under varying temperature conditions . |
| D. | none of these. |
| Answer» B. substantially high change in fluidity of oil with temperature. | |
| 214. |
Phthalic anhydride is used |
| A. | in making PVC |
| B. | as plasticisers |
| C. | in insecticides manufacture |
| D. | for making nylon-6 |
| Answer» C. in insecticides manufacture | |
| 215. |
Main product in calcium carbide-water reaction is |
| A. | Ca(OH)2 |
| B. | C2H2 |
| C. | CO2 |
| D. | CaCO3 |
| Answer» C. CO2 | |
| 216. |
Thorium is mainly used |
| A. | for the manufacture of gas mantles. |
| B. | as a fissile fuel in a nuclear reactor. |
| C. | in the manufacture of hydrogen bomb. |
| D. | in the treatment of cancer. |
| Answer» B. as a fissile fuel in a nuclear reactor. | |
| 217. |
Massacuits is a terminology used in the __________ industry. |
| A. | paint |
| B. | oil hydrogenation |
| C. | soap |
| D. | sugar |
| Answer» E. | |
| 218. |
Alum [Al2(SO4)3] is used as a coagulant in water treatment to remove |
| A. | colour |
| B. | turbidity |
| C. | bacteria |
| D. | all (a), (b) and (c) |
| Answer» E. | |
| 219. |
Potassium is kept & transported under |
| A. | water |
| B. | liquid ammonia |
| C. | kerosene oil |
| D. | alcohol |
| Answer» D. alcohol | |
| 220. |
Which of the following is a disacchride ? |
| A. | Sucrose |
| B. | Glucose |
| C. | Starch |
| D. | Maltose |
| Answer» B. Glucose | |
| 221. |
Dehydrogenation of isopropanol produces |
| A. | propyl alcohol |
| B. | acetone |
| C. | trichloroethylene |
| D. | formaldehyde |
| Answer» C. trichloroethylene | |
| 222. |
Fumigant insecticides |
| A. | kill insects, when they eat it. |
| B. | emit poisonous vapour. |
| C. | are absorbed throughout the plant. |
| D. | none of these. |
| Answer» C. are absorbed throughout the plant. | |
| 223. |
Le-Blanc process is a primitive process for the manufacture of |
| A. | caustic soda |
| B. | soda ash |
| C. | bromine from sea water |
| D. | hydrochloric acid |
| Answer» C. bromine from sea water | |
| 224. |
The major constituent of black liquor generated during paper manufacture is sodium |
| A. | sulphate |
| B. | carbonate |
| C. | hydroxide |
| D. | bi-carbonate |
| Answer» C. hydroxide | |
| 225. |
Titanium dioxide is a/an __________ colour pigment. |
| A. | white |
| B. | black |
| C. | yellow |
| D. | blue |
| Answer» B. black | |
| 226. |
Oxygen is separated by distillation from air after its liquefaction. The boiling point of oxygen is about __________ °C.$ |
| A. | -83 |
| B. | -183 |
| C. | -196 |
| D. | -218 |
| Answer» C. -196 | |
| 227. |
Chemical formula of oleum is |
| A. | H2SO3 |
| B. | H2SO4 |
| C. | H2S2O7 |
| D. | H2SO7 |
| Answer» D. H2SO7 | |
| 228. |
__________ is an ore concentrating metallurgical process involving a chemical change. |
| A. | Electromagnetic separation |
| B. | Froth floatation |
| C. | Roasting |
| D. | none of these |
| Answer» D. none of these | |
| 229. |
Setting of plaster of paris is accompanied with |
| A. | hydration |
| B. | dehydration |
| C. | hydrolysis |
| D. | loss of CO2 |
| Answer» B. dehydration | |
| 230. |
Which of the following is used as a coagulant in water treatment ? |
| A. | Chloramine |
| B. | Chlorine |
| C. | Ferrous sulphate |
| D. | Hydrogen peroxide |
| Answer» D. Hydrogen peroxide | |
| 231. |
Temporary hardness of water can be removed by |
| A. | addition of alum (a coagulant). |
| B. | boiling. |
| C. | filtration (through gravity sand filter). |
| D. | addition of lime. |
| Answer» C. filtration (through gravity sand filter). | |
| 232. |
Sulphuric acid is mainly used in the __________ industry. |
| A. | fertiliser |
| B. | steel |
| C. | paper |
| D. | paint |
| Answer» B. steel | |
| 233. |
Liquefaction of gases can not be done by |
| A. | exchange of heat with colder stream. |
| B. | adiabatic expansion through a throttle valve (Joule-Thomson expansion). |
| C. | merely compressing it beyond critical pressure. |
| D. | adiabatic expansion against a piston or in a turbine. |
| Answer» D. adiabatic expansion against a piston or in a turbine. | |
| 234. |
The main aim behind cooling the digested chip at the bottom portion of the digestor by injecting cold black liquor is to |
| A. | avoid mechanical weakening of fibre. |
| B. | remove lignin by way of crystallisation. |
| C. | increase the cellulose content. |
| D. | none of these. |
| Answer» B. remove lignin by way of crystallisation. | |
| 235. |
Phthalic anhydride is produced by the oxidation of |
| A. | naphthalene |
| B. | benzene |
| C. | toluene |
| D. | aniline |
| Answer» C. toluene | |
| 236. |
Which of the following coals has the highest calorific value ? |
| A. | Lignite |
| B. | Sub-bituminous |
| C. | Anthracite |
| D. | Peat |
| Answer» D. Peat | |
| 237. |
Electrodeposition of metals i.e. electroplating is never done on |
| A. | metals |
| B. | alloys |
| C. | refractories |
| D. | non-metals |
| Answer» D. non-metals | |
| 238. |
Cement setting under water employs a/an __________ process. |
| A. | hydration |
| B. | decomposition |
| C. | oxidation |
| D. | reduction |
| Answer» B. decomposition | |
| 239. |
Dacron (or terylene) fibres as compared to nylon'fibres have |
| A. | better heat & acid resistant properties. |
| B. | poorer resistance to alkalis. |
| C. | poorer dyeability. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 240. |
Paper grade bamboo contains about __________ percent cellulose. |
| A. | 5 |
| B. | 20 |
| C. | 40 |
| D. | 60 |
| Answer» B. 20 | |
| 241. |
Which one of the following is not likely to be a constituent of vegetable oils ? |
| A. | Citric acid |
| B. | Oleic acid |
| C. | Stearic acid |
| D. | Glycerol |
| Answer» B. Oleic acid | |
| 242. |
A cane sugar factory having sugar production rate of 10 tons/day will produce about __________ tons/day of bagasse (after consumption by the factory for heating etc.). |
| A. | 1 |
| B. | 10 |
| C. | 25 |
| D. | 40 |
| Answer» C. 25 | |
| 243. |
Alcohol is produced by the |
| A. | oxidation of an aldehyde |
| B. | hydrolysis of an ether |
| C. | esterification of a fat |
| D. | none of these |
| Answer» C. esterification of a fat | |
| 244. |
Reaction of an alcohol with organic acid is called the __________ reaction. |
| A. | saponification |
| B. | esterification |
| C. | neutralisation |
| D. | acidification |
| Answer» C. neutralisation | |
| 245. |
Pick out the false statement pertaining to water treatment. |
| A. | Aeration of water is effective in CO2 removal. |
| B. | The zeolite water softening process reduces the hardness of water by not more than 50%. |
| C. | Sodium sulphate or sodium carbonate do not cause hardness in water. |
| D. | Water with pH value less than 7, is acidic. |
| Answer» C. Sodium sulphate or sodium carbonate do not cause hardness in water. | |
| 246. |
Hydrolysis of sugar is called |
| A. | hydration |
| B. | inversion |
| C. | esterification |
| D. | none of these |
| Answer» C. esterification | |
| 247. |
Builders are added in soap to act as |
| A. | cleaning power booster |
| B. | anti-redeposition agent |
| C. | corrosion inhibitor |
| D. | fabric brightener |
| Answer» B. anti-redeposition agent | |
| 248. |
Yeast is used in the manufacture of |
| A. | pencillin |
| B. | antibiotics |
| C. | wine |
| D. | pasteurised milk |
| Answer» D. pasteurised milk | |
| 249. |
Hydrogenation of oil/fat does not |
| A. | improve its resistance to rancid oxidation. |
| B. | raise its melting point. |
| C. | remove double bonds. |
| D. | none of these. |
| Answer» E. | |
| 250. |
Analgesic drugs are |
| A. | pain relievers |
| B. | antibiotics |
| C. | used in the treatment of T.B. |
| D. | used in the treatment of typhiod |
| Answer» B. antibiotics | |